diff --git a/tensorflow/python/training/checkpoint_ops_test.py b/tensorflow/python/training/checkpoint_ops_test.py
index a0fd2dc6bae..5a6a66f1312 100644
--- a/tensorflow/python/training/checkpoint_ops_test.py
+++ b/tensorflow/python/training/checkpoint_ops_test.py
@@ -18,6 +18,7 @@ from __future__ import division
 from __future__ import print_function
 
 import os
+
 import numpy as np
 
 from tensorflow.python.framework import constant_op
diff --git a/tensorflow/python/training/checkpoint_utils.py b/tensorflow/python/training/checkpoint_utils.py
index 64ba099ce79..1c249035980 100644
--- a/tensorflow/python/training/checkpoint_utils.py
+++ b/tensorflow/python/training/checkpoint_utils.py
@@ -19,6 +19,7 @@ from __future__ import division
 from __future__ import print_function
 
 import time
+
 import six
 
 from tensorflow.python.distribute import distribution_strategy_context
diff --git a/tensorflow/python/training/checkpoint_utils_test.py b/tensorflow/python/training/checkpoint_utils_test.py
index 59972e6b230..caba001a08b 100644
--- a/tensorflow/python/training/checkpoint_utils_test.py
+++ b/tensorflow/python/training/checkpoint_utils_test.py
@@ -20,6 +20,7 @@ from __future__ import print_function
 
 import os
 import time
+
 import numpy as np
 
 from tensorflow.core.protobuf import config_pb2
diff --git a/tensorflow/python/training/experimental/mixed_precision_test.py b/tensorflow/python/training/experimental/mixed_precision_test.py
index bbf9badfcf1..7397ae9a086 100644
--- a/tensorflow/python/training/experimental/mixed_precision_test.py
+++ b/tensorflow/python/training/experimental/mixed_precision_test.py
@@ -18,6 +18,7 @@ from __future__ import division
 from __future__ import print_function
 
 import os
+
 from absl.testing import parameterized
 
 from tensorflow.core.protobuf import config_pb2
diff --git a/tensorflow/python/training/session_manager.py b/tensorflow/python/training/session_manager.py
index 9c2db27af2c..fe622097e74 100644
--- a/tensorflow/python/training/session_manager.py
+++ b/tensorflow/python/training/session_manager.py
@@ -18,6 +18,7 @@ from __future__ import division
 from __future__ import print_function
 
 import time
+
 import numpy as np
 
 from tensorflow.python.client import session
diff --git a/tensorflow/python/training/warm_starting_util.py b/tensorflow/python/training/warm_starting_util.py
index fa334a41875..4d329b4b316 100644
--- a/tensorflow/python/training/warm_starting_util.py
+++ b/tensorflow/python/training/warm_starting_util.py
@@ -19,6 +19,7 @@ from __future__ import division
 from __future__ import print_function
 
 import collections
+
 import six
 
 from tensorflow.python.framework import errors
diff --git a/tensorflow/python/training/warm_starting_util_test.py b/tensorflow/python/training/warm_starting_util_test.py
index 14fa2430477..084779b332c 100644
--- a/tensorflow/python/training/warm_starting_util_test.py
+++ b/tensorflow/python/training/warm_starting_util_test.py
@@ -19,6 +19,7 @@ from __future__ import division
 from __future__ import print_function
 
 import os
+
 import numpy as np
 import six